We have learned to approximate and then precisely measure time millennia ago through various means, yet never on this journey we learned to alter it, except by a miniscule margin using relativistic effects.
We can measure distance, and we can move things. We can measure illumination, and we can create light. We can measure sound, and produce it. Alter temperature? Yes! Produce all sorts of artificial radiation? Yes! Electric charge? Sure!
But time? Nuh-uh.
They all are concepts that can be tied to something material. We know how to manipulate matter to create more light, for example, yet lumen is as intangible as is centimeter